Portable Document Format (PDF)

PDF is Adobe's Portable Document Format. It is closely related to
PostScript, but has built-in support for hyperlinking (for example,
in most of the PDF we generate, when you click on an equation number,
the page with the equation will be displayed).
We generate PDF for all papers submitted as TeX source or PostScript.
On the other hand, papers submitted in PDF are available only in PDF.

You can choose to make PDF your default format for downloading
and viewing papers by setting a cookie in your browser.

Recommended Viewing Software

Adobe's Acrobat Reader (Acroread)

Versions of Adobe's Acrobat Reader ("acroread" on Linux/Unix systems) less
than 6 were plagued with several problems, such as missing minus signs and
parentheses in PDF display and printout.
We therefore highly recommend that you download and install the
current version.

Do not install Acroread as a plug-in. Bugs in this arrangement
mean that the browser will sometimes generate multiple rapid-fire
requests, which may trigger one of our robot-tripwires and block your access.
Please download all PDFs to your local machine and open them with the full Adobe Acrobat Reader application.

Xpdf

Xpdf is an open source viewer for
PDF files. The Xpdf project also includes a
PDF text extractor, PDF-to-PostScript converter, and various other utilities.

This viewer will only display rotated fonts if using t1lib, or
if your X server is capable (most are not). If fonts can't be rotated,
the paper identifier printed at the left side of the page is displayed
strangely, but otherwise most papers will be fine.